I got a Provari V2.5 ... I think you would be surprised how small the full size Provari actually is .. I have a Vamo V2 in stainless and it towers over the Provari both using 18650 batteries ... Vamo has VW tried it in watts for a while ... I changed the wattage all the time as well, different juices n tops things still need adjusted then switched it even back to volts ... so for "me" having watts n volts is really pointless I was still changing them all the time